With Deltas shortcut to Liberia

From a lot of US Cities there are direct flights to San José, offered by American Airlines, Delta, United Airlines or Continental. There are also cheaper Charter flights.
New direct connections to Liberia in Guanacaste from Delta Airlines are the perfect shortcut to all the beaches at the Golden Pacific Coast.
The Costa Rican Inland-Airline Sansa offers flights every day from San Jose to Liberia in Guanacaste or Tamarindo, close to Junquillal.

The german airline LTU flies direct to Costa Rica, mostly with a stop in the USA. Additional Airlines from Europe are the Spanish Iberia, the Dutch Martinair or the US-Airlines Delta, United, American and Continental.